21502180

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{593}}^1$

素因数の和:653

約数の個数: 72

約数和(自身を含む): 54037368

約数和(自身を除く): 32535188

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 49, 70, 74, 98, 140, 148, 185, 196, 245, 259, 370, 490, 518, 593, 740, 980, 1036, 1186, 1295, 1813, 2372, 2590, 2965, 3626, 4151, 5180, 5930, 7252, 8302, 9065, 11860, 16604, 18130, 20755, 21941, 29057, 36260, 41510, 43882, 58114, 83020, 87764, 109705, 116228, 145285, 153587, 219410, 290570, 307174, 438820, 581140, 614348, 767935, 1075109, 1535870, 2150218, 3071740, 4300436, 5375545, 10751090, 21502180]

約数ペア:

[(1, 21502180), (2, 10751090), (4, 5375545), (5, 4300436), (7, 3071740), (10, 2150218), (14, 1535870), (20, 1075109), (28, 767935), (35, 614348), (37, 581140), (49, 438820), (70, 307174), (74, 290570), (98, 219410), (140, 153587), (148, 145285), (185, 116228), (196, 109705), (245, 87764), (259, 83020), (370, 58114), (490, 43882), (518, 41510), (593, 36260), (740, 29057), (980, 21941), (1036, 20755), (1186, 18130), (1295, 16604), (1813, 11860), (2372, 9065), (2590, 8302), (2965, 7252), (3626, 5930), (4151, 5180)]